<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            /* 为了解决外边距塌陷的问题 */
            border-top: 1px solid transparent;

            width: 500px;
            height: 500px;
            margin: 100px auto;
            background-color: #235fda;
        }

        .ellippe{
            width: 450px;
            height: 82px;
            line-height: 82px;
            margin: 200px auto;
            background-color: #fcfffc;
            /* 高的一半为椭圆 */
            border-radius:  41px;
        }

        .logo{
            /* 文字和图片居中对齐 */
           vertical-align:middle;
           margin-left: 100px;
        }

        .m_txt{
            font-size: 20px;
            font-weight: 500;
            margin-left: 12px;
            color: #6380c1;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="ellippe" >
            <img class="logo" src="images/mi_log_03.png" alt="">
            <span class="m_txt" >使用小米账号登录</span>
        </div>
    </div>
</body>
</html>